What is CVE-2011-0544?

CVE-2011-0544 is a medium-severity vulnerability in phpBB, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2019-11-14.

How severe is CVE-2011-0544?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in phpBB

CVE-2011-0544

phpbb 3.0.x-3.0.6 has an XSS vulnerability via the [flash] BB tag.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2019-11-14 · last modified 2026-06-16.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.008 (56.1th percentile), scored 2026-10-25.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 56.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

phpBB
Phpbb3 — versions 3.0.x-3.0.6
Debian Linux — versions 8.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

security-tracker.debian.org/tracker/CVE-2011-0544 (Third Party Advisory)
access.redhat.com/security/cve/cve-2011-0544 (Broken Link)

Frequently asked questions

What is CVE-2011-0544?: CVE-2011-0544 is a medium-severity vulnerability in phpBB, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2019-11-14.
How severe is CVE-2011-0544?: Medium severity. CVSS v3 base score is 6.1 out of 10.